GAEP product names distinguish tool types, closure profiles and materials. This reference follows the manufacturer catalogue and links to the corresponding product families at ShotCrimp.
Steel OTP: roll-crimp model
GAEP describes its steel OTP as a tool for a round-rim closure on plastic cases. See the OTP roll crimper product page for the gauge options currently listed by ShotCrimp.
BN1, BN2, BN3 and BN4: star-crimp finishers
The manufacturer groups BN1, BN2, BN3 and BN4 under star-crimp finishers. This naming alone does not establish that a particular model is suitable for a particular ammunition load. View the BN2 product page and confirm the exact specification for your equipment.
STP, STC and OTC
In the manufacturer catalogue, STP denotes a star-closure model for plastic cases, STC a star-closure model for paper cases and OTC a roll-closure model for paper cases. Check the individual product listing because materials and gauge options vary.
Steel and brass product ranges
GAEP lists both steel and brass crimp finishers. A material label identifies the product range; it is not proof of a particular service life or a measured advantage over another tool. Browse the GAEP crimper collection to compare listed products.
Before purchasing
Confirm the model, material, gauge, mounting connection and included parts against the actual listing. If a detail is unclear, ask ShotCrimp before ordering.
Sources
GAEP manufacturer model descriptions and product catalogue, checked 22 October 2026.